Study On The Out-of-plane Eccentric Compression Behavior Of Cast-in-place Phosphogypsum-concrete Mesh Frame Composite Wall

Guizhou Province is rich in tourism resources, beautiful scenery of the mountains for GDP has made a great contribution to the however Guizhou phosphate rock resources as a big province, annual production of phosphoric acid by wet process emissions a lot of phosphogypsum, the mountains on which we rely for survival caused great pollution.Industrial waste phosphogypsum cast-in-situ grid frame constitute a grid frame composite wall, phosphogypsum will be transformed for the new building materials, reducing the amount of concrete, to promote the use of Phosphogypsum Resource, and is conducive to environmental protection and economic development in Guizhou Province.This paper describes the Research status and research purpose and significance of phosphorus gypsum, energy saving wall and net form frame combination wall. In this study, the mechanical properties of the composite wall with cast- in- situ p-gypsum concrete net frame composite wall are studied by using the theory of finite element linear elasticity. The data analysis shows that the cast in place phosphorus gypsum has a significant effect on the strength of the composite wall.According to the finite element analysis were developed as a result test scheme,according to the proportion of 1 / 3 scale produced four groups of specimens of eccentric distance for the vertical loading test of 40 mm, each specimen with 2 pieces of composite wall specimens and a net frame format.The test results show that: the floor beam of the test piece is first in the crack of the floor beam, the middle column is crushed by the side column, and when the test piece is destroyed, the composite wall can be seen obviously.Composite wall with openings on the structure bearing capacity has obvious effect, not composite wall with holes of the bearing capacity is about 1.5 times of the bearing capacity of the grid frame, and composite wall with holes of the bearing force and the frame format of the bearing force is quite. Cast in situ phosphorus gypsum can effectively share the structure of the vertical eccentric load, in the same level of eccentric vertical load, the composite wall of concrete members under the compressive stress is significantly lower than the pure net frame members of the compressive stress.The stress results of the elastic finite element analysis and the stress test results before the cracking of the specimens are small,which obviously indicate the strength contribution of the cast in place.In this paper, the internal force distribution coefficient of the composite wall concrete column under the action of vertical eccentric load is studied. In order toinvestigate the effect of vertical eccentric force changes in the size of the effects of different section concrete column internal force distribution coefficient, the out of plane eccentricity is 40 mm and four different vertical eccentric force applied in cast-in-place phosphorus gypsum concrete network frame format combination walls and frameworks for the comparison. In order to investigate the openings, door case to study the influence of different sections of the grid frame composite wall by tensile,compressive concrete column internal force distribution coefficient, through openings,the door cases with the same component dimensions and sectional examples were compared. Analysis shows that the load changes had little effect on different section concrete column internal force distribution coefficient, and openings, the door case of concrete columns in the effects of different cross section column internal force distribution coefficient has great influence, especially effect on the opening hole on both sides of the column and the open side of the column and edge column internal force distribution coefficient is particularly evident.